Machine for making- bolts



R. H. COLEQOF ST.

LOUIS, MISSOURI.

MACHINE FOR MAKING IBOLTS. f

Speccation of Letters Patent No.

18,534, dated November 3, 1857.

To all whom t may concern Be it known that I, RICHARD I-I. COLE, of the city of St. Louis and State of Missouri, have invented a new and Improved Machine for MakingMetallic Bolts; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawing, making a part of this specication, in which- Figure 3 is a plan, Fig@ a front eleva` tion, and Figs. 11 and 12 show a section through the line A, as seen from opposite ends ofthe machine, Fig. 11 showing an` end elevation of the gripping jaws, together` with the knife and'mode of operating it, and Fig. 12 a front elevation of the die or heading box F. Fig. 1 is a side elevation ofthe slides D and E showing their relative'position with each othertogether with the working parts attached to them and also the relative position of the cams on the shafts B and D.

The nature of my invention consistsrst in pressing the head on the bolt in a moving die, or heading box against a yielding tool by the motion of the bolt instead of the tool. Second in devising means for pointing the bolt and cutting it from the bar in a single operation. Third in gripping thebolt between a lixed and yielding jawso as to keep the machine from breaking in case anything should get between the said jaw.

The construction and operation whereby I effect the objects above pointed out will be understood from the following description of the aforesaid drawingsimilar letters represent corresponding parts on the different figures. I first make the frame A A of the form shown on the drawing, with the plumber blocks B B cast on it. In the inside of the frame and on each side of it, I cast the ribs C C, and in the top of them I plane square grooves, in which I insert strips of steel as shown at V, which I make adjustable by means of the adjusting screws e e shown at Fig. 11. I then make the slides D and E. Fig. 10 shows an elevation, and Fig. 5 a plan of the slide D. Fig. 9 is an elevation and Fig. 4C a plan` of the slide E. These slides I make to work in the frame on the ribs or foot pieces c c as shown at Figs. 11 and 12. I gripthe bolt between a pair of jaws, one of which I cast l the slide D, and correspond with the jaw T, "cast on that slide. The sliding jaw is held in position by means of the angular foot P, and the gib Q, which is adjusted by the screws r. 7". On the bottom of the slide D and at right angles with it, I cast the two lugs G G and between them I place the slide H and secure it by means of the gib I as shown at Fig. 1. This slide I make with an incline plane on one of its ends and in the under side of it I insert two round balls-shown at J Figs. 1 and ll-which take their bearing on the bottom of the frame as shown at K Fig. 11. A side elevation and a plan of this slide is shown at I-I II Fig. 10. On the under side of the slide D Icast'a pair of lugs, to receive; and form a center for the bar-to vibrate around as shown by the dotted lines at M. In the end of this bar vand in the under side of it I insert a roller, which is acted upon by the incline plane K. On the end of the slide I-I, and directly over this roller in the top of the bar, I cut a circular groove and in it I set the lower end of the knife N which works up through the slide-D at the back end of the gripping jaws, so as to cut the bolt from the bar after the jaws have gripped it.

The lugs forming the center for the bar L to vibrate around are set apart a distance equal to the difference in the length of the different bolts, so that the position of the bar L can be altered by moving it backward or forward, as the case may require, and by putting washers against its side to hold it in the given position. And as the knife N works through a slot in the slide it can also be moved backward or forward, so as to keep its position on the bar L. y

In the top of the slide D and at the back of the knife I cut a long groove and in it I place the adjusting slide O so as to come flush with the top of theslide, and inthe bottom of this groove I cut a slot through the slide big enough to receive a bolt and allow it to slide freely from one end to the other. So that vwhen it is desired to move the knife and bar L-one way or the otherthe slide O, may be advanced,'or` moved back so as to keep its position against the back of the knife, whereby it will be supported while the head is being pressed on the bolt.

The knife N is pressed up and made to cut olf the bolt by the action of the inclineplane K and is brought down by the action of the spring H shown in dotted lines, Fig. 1.

I make the tools for gripping the bolt as shown at Figs. 7 and 8. U is a piece of steel, turned and bored to the form shown, and inserted in the jaw, where it is secured by means of a key, as shown, and H is likewise a piece of steel turned and bored as shown, and inserted in the piece U and keyed there. Each size bolt requires a dif ferent set of tools, because the knife has to work against the end of the tool H and the tool U has to be cut away to let the knife up to its position as shown.

The inside of the tool H is made as shown at Z Figs. 7 and 10--that is-with the vform that receives the bolt countersunk from the forward end and with the countersink filed out from the center downward, so that the tools in coming together will form a point on the top side of the bolt, or in other words will form half of the required point on the bolt, and in doing so will slightly bend it downwardin the recess cut in the bottom side of the tool, so that by the action of the knife in cutting the bolt will be brought back to a straight line, and the remaining half of the required point formed on the bolt by an offset on the knife which has a form in it to correspond with the countersink in the top side of the tools H, as shown at Z, Fig. 10,

In the end of the slide E, I insert the crotch a made in the form shown on the drawing at Fig. 6 and secure it by means of jam nuts, as shown, and in the end of each branch of this crotch, I insert two rollers, one on each side as shown in dotted lines o o Fig..3, and on the outside of each branch of the said crotch I bolt a sliding cam as shown at d one of which acts on a pin fixed in the jaw S, and the other on a similar pin fixed in the slide H, so that when the machine is in motion the cams d d will act on their respective pins (one of which is shown at Z2) and throw back the jaw S and the slide H. On the back, or out end of the jaw S, I make an incline, plane or slidingA cam as shown at j and directly under this inclination, or cam, and on the slide H at I make another identical in every respect with the first, and in the same relative position, with the crotch roller. Now it will be seen by reference to Fig. 6 that the bottom branch of the crotch is the shortest, so that in advancing the top roller will strike the inclination j and close the jaw S, by the time the roller in the lower branch of the crotch begins to act on the inclination z' of the slide H, thus causing the knife N to cut the bolt from the bar and point it, as soon as the jaw S has gripped it. The outside roller in the top branch of the aforesaid crotch, takes its bearing against the spring X, and the correspondin roller in the lower branch takes its bearing against the rib C as shown at Fig. 11.

The spring X has its bearing against a rib cast on the frame for that purpose, as shown at 71. and the strap passing around it is continued, so as to form a bolt by which the spring is attached, and loaded to the the said rig. The object in making the top roller work against a yielding bearing is to prevent the machine from breaking in case there should get too much iron between the jaws, or in case the bar should not be fairly entered in the jaws. On the top of the slide E I lay the spring Y which has its bearing against the bar U, to which it is also bound by means of the strap bolt IV,

and against the spring Y and to the strap WV, I secure the heading tool g, loosely, so as to vibrate in any direction. I cast the recess J in the top of the slide E, to receive the bottom of the strap W, and in the bottom of this recess I cast another, so as to allow the ends of the strap m to clear the slide when in operation, and I also cut a circular groove across the recess J to receive the roller n upon which the spring Y takes its bearing. On the end of the slide E at t, I place the die box F, which consists of a cylinder with both of its ends bored out, so as to leave a partition in the center and so as to receive the end of the slide in one end and the dies f f f f in the other.

The dies are made of the form shown on the drawing with their angles to lap passed the center in each direction by which the hole in the center may be made larger or smaller, as the case may require, by means of the adjusting screws 7c 7c. held down on the bottom of the box by the screws s s s s, the heads of which take their bearing against eccentric pieces let in the dies, so that when it is desired to adjust the dies in either direction these screws are removed, and the dies adjusted to the desired position, and the eccentric pieces turned to correspond with the holes in the bottom of the dies. The screws are then replaced and the dies are ready for use. On the shaft D I place the two cams, made in the form shown on the drawing, the small cam carries the slide forward and the large carries it back, and they are so constructed as to work against each other, that is-the one advances as fast as the other recedes-and so as to carry the slide forward in four sixteenths, and back in three sixteenths of the revolution of the cam, thus causing the slide to remain in the backward position during nine sixteenths of the revolutions of the cam.

On the shaft B I also place two cams of the form shown to work against each other precisely as in the case of those on the shaft D. Each of these cams work against rollers placed in brass or iron boxes as shown. These boxes I make adjustable by means of keys, shown in dotted lines at N Fig. l so that when it is desired to make bolts of dierent sizes the relative position of the slides D and E may be altered, by putting the packing pieces (shown at Z in dotted lines Fig. l) behind the opposite boxes whereby the slide E will be thrown back and the slide D forward7 thus causing the tool g to reach farther through the die box, and so as to leave a narrower space between the end of the tool and the heading jaw, which will make the head on the bolt correspondingly less in thickness. Let the shaft B and D revolve in the direction of the arrows; it will be seen by the position of the cams on the two shafts that when the cam B is on its extreme forward throw the cam D will just commence to act, and it will also be seen that the cams on the shaft B have one inch more throw than those on the shaft D, so that when the machine is in operation the cam D follows the cam B as fast as it recedes until it arrives at its extreme forward throw; it then returns, and the cam B continues to recede the remaining inch of its throw carrying the die box back on the heading tool whereby the bolt head is displaced from the die in which it was formed.

Let us suppose thev machine in operation and suppose both cams on their backward throws as seen at Fig. 1. The slidesD andE will then be at their greatest distance from each other. The bar of iron is then shoved through the aws (which are now open) against the tool g which is at rest. The cam B then commences to advance and carry the die box forward on the tool g, and the crotch a is also carried forward against the inclination j on the jaw s so as to close it, and as soon as the jaw is closed the lower branch of the crotch commences to act on the inclination z' on the slide I-I which causes the incline plane K to press the knife N up so as to cut off the bolt from the bar. The

bolt is now cut off and pointed, and the knife is against the end of the bolt; and the face of the die box is up against the end of the gripping jaws. The cam D now commences to advance and the cam B to recede, thus keeping the faceof the gripping jaws against the face of the die box until the cam D has arrived on its extreme forward throw. The jaw then returns to its backward position, while the cam B continues to recede and carry the die box back on the heading tool and o' of the bolt head, which then drops to the ground finished. The first operation then is to grip the bar; the second is to cut off the bolt and point it, and the third is to carry it forward against a yielding punch whereby the head is pressed on it in a die box, which being removed by the action of the cam, completes the operation and releases the bolt from the machine.

What I therefore claim as my invention and desire to secure by Letters Patent is- 1. Pressing the head on the bolt in a moving die box or die, and against a yielding tool or support substantially as set forth by the motion of the bolt instead of the tool substantially as described.

2. And I also claim the combination of the spring X, the crotch a and the jaw S, so that the crotch a or its substitute in pressing the jaw S forward shall act against a yielding` medium for the purpose specified.

3. And Ialso claim the internal construction of the gripping tools H as shown at ze, whereby each of the said tools in closing shall form one fourth of the point on the bolt, thus making half of the point when closed.

4L. And I claim finishing the point on the bolt, that is, completing it, by an offset made on the side of the knife N having a form in it to correspond with the form in the end of the tools II, the said offset to be below the cutting edge of the knife a distance equal to the diameter of the point of the bolt when finished, so as to make the point of bolt like the frustum of a cone.

R. II. COLE.

Witnesses:

Trios. W. LAVERGE, JAS. R. DrcxsoN. 

